What causes an aurora? OA
An aurora is the consequence of solar wind entering the Earth and cutting through the Earth's magnetosphere.
OB.
An aurora is the consequence of combustion of gases taking place at the poles of the Earth.
Ос.
An aurora is the consequence of solar prominences entering the Earth
OD
An aurora is the consequence of Sunspots entering the Earth

Which was not a country that massively built up its navy in the early 1900s? germany china united statesbritain

What is the difference between the cultures of central asia and the caucasus region? the majority of people in central asia are muslim; the majority in the caucasus region are christian. the primary language in central asia is armenian; the primary language in the caucasus region is russian. central asia has been plagued by ethnic unrest; the caucasus region has had little ethnic conflict. the effects of soviet rule can still be seen in central asia; the caucasus region has developed its own identity since the fall of the ussr.

Triangle with the the sides 72 and 75 and x. also other trsingle withsides 24 25 and 7. what is the value of x.